Advanced Materials Research Vols. 143-144

Abstract: The investment model of stochastic neutral technical progress is given in this paper. The main purpose of this paper is to consider the exponential stability of the Euler-Maruyama scheme for a class of stochastic investment system. The de¯nition of exponential of numerical methods is established. The conditions under which the method is exponentially stable in mean square determined.

Abstract: The well-known password authentication mechanisms are widely used in networks to protect resources from unauthorized access. The ad hoc networks, due to their dynamic and lack of network infrastructure features, require authentication schemes to ensure security. In this paper, we propose a new threshold password authentication scheme for ad hoc networks. Our scheme can be efficiently implemented in mobile devices, and can achieve mutual authentication with registered users.

Abstract: A novel combination method is proposed in order to efficiently combine conflict evidence. The credibility of the evidence is derived by introducing a distance function, and the conflict probability is distributed to every proposition according to its credibility. Better performance is demonstrated by numerical examples compared with three other methods.

Abstract: With the rapid development of information technology, many changes and problems have taken place to the basic computer education. A systematic investigation of related issues and a study of countermeasures to solve the corresponding problems according to the author’s own practice and experience in educational reform will be presented in the paper

Abstract: Establishing a 2-DOFs of 1/4 semi-active suspension system model, using genetic algorithm approach, to design fuzzy logic controller of the semi-active suspension and simulate in the environment of Matlab/Simulink. The results of being compared with the passive suspension demonstrate is that this developed fuzzy logic controller based on genetic algorithm enhances the performance of the full car suspension system significantly.

Abstract: Shape memory alloy (SMA) can be embedded into a host material to achieve shape control, damage repair and self-adaption. It is well recognized that the applications of SMA composites are highly dependent on the integrity of SMA fiber-matrix interface. However, the interfacial debonding often occurs due to the weak bonding of interface between the SMA wire and its surrounding matrix. Therefore, it is necessary to improve interfacial strength of SMA composites. In present paper, the epoxy resin is functionalized by mixing different amount of silane coupling agent to improve the interfacial adhesion of SMA fiber reinforced epoxy matrix composite. The single fiber pull-out test is carried out to evaluate the interfacial strength and the test results indicate that the interfacial strength of SMA composite is improved significantly as compared to the results from unfunctionalized samples.

Abstract: For the complexity of the environment system,a wireless sensor network paradigm based on the technique of ZigBee and GPRS for wetland detection in real time was put forward according to the factors of wetland environment. The architecture of wireless sensor network for wetland environment detection was described also. And the hardware circuit of networks’node was designed based on the chip of CC2430 in this paper , as well as the process of data transmission was discussed in detail . Some environment parameters such as temperature, humidity, etc. in the wetland region can be monitored real-timely. After all, it should be useful for needs of the wetland conservation. Science and technology support projects in Jiangxi Province, Jiangxi Science Planning Projects funded

Abstract: A general fusion classification model is proposed, which based on information fusion, dealing with multi-media information of WEB for classification. In the model, different information is extracted from the same WEB page, processed by different pre-processing method and classification algorithm. The different classification result of Sub fusion layer is input into the Fusion layer separately. And the final classification result output from Fusion layer. The experiment shows, the fusion classification model can improve the classification precision effectively.

Abstract: In this research, the principle of diamagnetic levitation is described briefly. The application perspectives of diamagnetic levitation and its advantages are as well discussed. By utilizing the magneto-Archimedes Effect to lift different seeds, the experimental procedures and parameters are provided which include magnetic characteristics of magnets and ratios of magneto-Archimedes solution. The theoretical derivation and finite elements simulation of force when the seeds suspend are conducted. These resolving formulas, methods of numerical simulation as well as means of experiments are meaningful as reference to the researches in this field.

Abstract: The study is researched to establish a multi-body dynamic model of the Vehicle by using Adams /Car software package. Using genetic algorithm approach，fuzzy logic controller of the semi-active suspension was designed, simulated in the environment of Matlab/Simulink.. The results of being compared with the passive suspension demonstrate that this developed fuzzy logic controller based on Adams /Car and Matlab/Simulink enhances the performance of the full car suspension system significantly.